Dipper



March 28 1933. D H, MEYER v 1,903,123

DIPPER Filed July 26, 1950 2 Sheets-Sheet 1 D. H. MEYER March 28, 1933.

DIPPER 2 Sheets-Sheet 2 Filed Jul a 1950 Patented Mar. 2 8, 1933 UNITED STATES PATENT- OFF E DANIEL HENRY MEYER, or WILMINGTON; ILLINOIS, Ass st TOR TO AMERICAN MANGANESE s'rnnr. COMPANY, OF CHICAGO, ILLINOIS,-A CORPORATION OF MAINE Application filed .Tjuly 26,

This invention relatesto dippers, and is illustrated as embodied in a dipper in which the tooth base is held in place on the dipper front by means of plugs, which latter are held in place by means of tapered pins.

7 This invention may be used advantageously in combination with the invention disclosed in Patent, No. 1,7 22,154, which was issued to applicant on July 23, 1929. That patent covered specifically the attachment of a dipper tooth to a dipper base.

In former commercial practice, the dipper base has been attachedto the dipper front by means of rivets. This has thesame disadvantages as the attachment of the dipper tooth to the dipper base by rivets, including especially the difliculty of replacing the parts. By the present invention, however, different problems are solved. It is undesirable to pass the plug through the structure and have the'tapered pins projecting above'and below the tooth base. It is likewise undesirable or impossible to pass a key horizontally and transversely through the base and dipper front.

In order to have a satisfactory and easily removable construction, the present invention is therefore necessary, and its object is to permit such'construction.

Additional and more detailed objects will be apparent from the following description, drawings andclaims. I

In the drawings, in which like numerals are used for similar parts throughout,

Figure 1 is a plan view of the dipper assembly with only a fragment of the dipper shown, and with the tooth attached in accordance with the prior Patent No. 1,722,154 above referred to; 1

Figure 2 is a side elevation of the dipper tooth base and-tooth;

Figure 3 is a section taken through that portion of-the dipper front over which the base is intended to fit;

Figure 4:.is a fragmentary end elevation of the assembly constituting the embodiment of this invention; V

Figure 5 is a fragmentary plan view, partially in section, illustrating the manner of securing the tooth base in place;

nirrnn 1930. Serial Np. 470,785.

Figure 6 isa perspective view of the peg the usual form, except as hereinafter described. The rivet holes have been omitted and the assembly therefore may be made somewhat lighter, though of equal strength, if desired. The dipper tooth 12 is illustrated as attached to the tooth base 10 in accordance with the teaching of the prior Patent No. 1,722,154 above lTlBI1t1OI16Cl. Briefly stated, this attachmentincludes a key 14: which is inserted through a hole in the tooth and into the socket in the tooth base, and which is held in place by a tapered pin 16. Of course, the tooth and base may be otherwise joined or made integral if desired.

' The tooth base 10 is carried by the dipper front 20. For the'purpose of securing a rigid and strong joint between the two, the base is provided with the usual legs 22 and '24:, which extend respectively above and below the dipper front. It is customary to attach the base by a series of rivets, each passing through'both legs and the dipper front.

"According to the present invention the rivets, together with their disadvantages, are

eliminated, and both of these legs are provided with one or more attachment lugs 26.

hole 28 join each other so that their walls .form a square vertical hole. Into this hole is inserted a key 36, which anchors the base in position. .The key bears against the shoulder 38 of the boss on the dipper front and the shoulder 40 of the lug on the base bears against the key, thereby preventing relative movement of the parts.

The rigidity andstrength are further increased by so shaping the key and the hole that .the key cannot turn therein; To prevent shearing, the key is preferably made of an extremely hard and tough metal, and whatever metal is used, it may be hardened by heat treatment impossible for rivets.

To hold the key in position, a tapered pin 42 is passed therethrough, and through a tapered hole between the lugs. In the side of each of the lugs is a tapered groove 44, which is shaped to receive the tapered pin 42. When the tooth base is in place, the adjoining lugs 26 and 30 form the tapered hole for the reception of the tapered pin 42. When the pin is driven in this hole from the front to back, as indicated in Figure 1, it not only locks the key 36 in place, but it also takes up any lateral play between the tooth base and the dipper front. The pins efiectively prevent vertical spreading of the legs, as such spreading would involve a shearing of the pins throughout their length.

There are preferably provided two sets of these cooperating lugs on the upper side of the dipper front and two sets on the lower side, each at the end of the leg, as indicated in Figures 2 and 3.

To further prevent lateral or twisting play, a set of aligning lugs 46 may be provided at the front end of the upper prong. These lugs bear against the aligning bosses 48 on the dipper front. In order to make the fitting more snug, the respective faces may be ground if desired. A similar function is performed by the aligning lugs 50 and 52 at I the extreme tip of the dipper front.

The operation of assembling and disassembling the dipper illustrated is as follows: In assembling, the tooth base is slipped onto the dipper front, sliding the aligning lugs 46 back between the corresponding aligning The dimensions are preferably such that when the tooth base seats against the front tip of the dipper front, the rectangular slots 28 and 32 in the corresponding lugs are in alignment. In any event, the

tooth base is slipped into such position that 45 these slots are in alignment, whereupon the key 36 is inserted into the square hole thus formed and the tapered pin 42 is inserted through the tapered hole between adjacent lugs and through the key 36, as shown best in Figure 5. The tapered pin is forced tightly into place. IYhen it is desired to remove the tooth base. it is merely necessary to tap out the tapered pin 42 and remove the key 36. This pin may be made shorter so as not to protrude, if desired. For the purpose of removing the key, a small hole may be provided through the dipper front in line with the key, although this is not necessary.

From the foregoing, it is seen that this invention has provided means for rigidly and durably attaching a tooth base to a dipper front in such manner that it may be readily removed.

It is to be understood that I do not wish to be limited to the exact embodiment of the device shown, which is merely by way of illustration and not limitation, as various and other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

I claim:

1. A dipper including a dipper front having a rearwardly facing shoulder thereon, a tooth base having a forwardly facing shoulder thereon extending laterally therefrom, said shoulders being so positioned that one can pass the other from front to back under some conditions, and means for preventing one shoulder from passing the other.

2. A tooth base for dippers including a pair of prongs so spaced as to straddle a dipper front, and a forwardly facing shoulder on each of said prongs extending laterally 1 therefrom.

3. A dipper including a substantially solid dipper front, a tooth base having prongs arranged to straddle said dipper front, means for attaching said base to said front, said means including juxtaposed lugs outstanding on said front and one of said prongs, said lugs being slotted to form an angularly shaped key socket the back side of which is formed in part by the lug on the prong and the front side of which is formed in part by the lug on the dipper front, and a key secured in said socket for preventing longitudinal movement between said prong and said dipper front.

4. A dipper including a substantially solid dipper front, a tooth base having prongs arranged to straddle said dipper front, means for attaching said base to said front, said means including uxtaposed lugs outstanding on said front and on one of said prongs, said lugs being slotted to form a key socket the back side of which is formed in part by the lug on the prong and the front side of which is formed in part by the lug on the dipper front, and a key secured in said socket for preventing longitudinal movement between said prong and said dipper front.

5. A dipper including a substantially solid dipper front, a tooth base having prongs arranged to straddle said dipper front, means for attaching said base to said front, said means including juxtaposed lugs outstanding on said front and on one of said prongs, said lugs being slotted to form a key socket the movement of said prong relative to said dipper front. I

6. A dipper including a dipper front having a rearwardly facing shoulder thereon, a tooth base having a forwardly facing shoulder thereon extending laterally therefrom, said shoulders being so positioned that one can pass the other from front to back under some conditions, and a key inserted between said shoulders for preventing one from passing the other.

7. A dipper including a dipper front having a rearwardly facing shoulder thereon, a tooth base having a forwardly facing shoulder thereon extending laterally therefrom, said shoulders being so positioned that one can pass the other from front to back under some conditions, a key inserted between said shoulders for preventing one from passing the other, said dipper front having a second shoulder thereon facing inwardly at right angles to the direction of said first shoulder, said tooth base having an outwardly facing shoulder opposed to said inwardly facing shoulder, and a pin insertable between said shoulders to prevent the lateral sepa ration of said base from said front.

8. A dipper including a dipper front having a rearwardly facing shoulder thereon, a tooth base having a forwardly facing shoulder thereon extending laterally therefrom, said shoulders being so positioned that one can pass the other from front to back under some conditions, a key inserted between said shoulders for preventing one from passing the other, said dipper front having a second shoulder thereon facing inwardly at right angles to the direction of said first shoulder, said tooth base having an outwardly facing shoulder opposed to said inwardly facing shoulder, and a pin insertable between said shoulders to prevent the lateral separation of said base from said front, said pin engaging said key for holding said key in place.

9. A tooth base for dippers including a pair of prongs so spaced as to straddle a dipper front, a forwardly facing shoulder on each of said prongs extending laterally therefrom, and an outwardly facing shoulder on each of said prongs at right angles to said forwardly facing shoulder.

Signed at Wilmington, Illinois, this 17th day of July, 1930.

DANIEL HENRY MEYER. 

